Rungwichitsin, Narongchai, and Sumalee Chinokul. 2022. “Effects of interleaved practice with cumulative schedule on Thai lower secondary students’ long-term retention of grammatical knowledge and their perception towards the instruction”. Kasetsart Journal of Social Sciences 43 (2):361‒368. https://so04.tci-thaijo.org/index.php/kjss/article/view/258494.